Re: How do I copy an element of composite type array into csv file?

On Wed, May 23, 2018 at 2:05 PM, a <372660931@qq.com> wrote:
> Hi suppose I have composite type and table
>
> create type A as(
>     x float8,
>     y float8
> );
>
> create table B(
>     Ay A[]
> );
>
> insert into B
> values(array[
>     (1,2)::A,
>     (3,4)::B]
> );
>
> Now I would like to export the first element of table B into an csv file:
>
> COPY B(Ay[1])
> to 'E:/products_199.csv'  DELIMITER ',' CSV HEADER;
>
> The code above reported an syntax error.
>
> How should I do it??
>

Try COPY (SELECT Ay[1] FROM B) to 'E:/products_199.csv'  DELIMITER ','
CSV HEADER;

Regards,
Amul